{{>partial_header}}

using System;
using System.Collections.Generic;
using System.Text;

namespace {{packageName}}.Client
{
    /// <summary>
    /// API Exception
    /// </summary>
    {{>visibility}} class ApiException : Exception
    {
        /// <summary>
        /// Gets or sets the error code (HTTP status code)
        /// </summary>
        /// <value>The error code (HTTP status code).</value>
        public int ErrorCode { get; set; }

        /// <summary>
        /// Gets or sets the error content (body json object)
        /// </summary>
        /// <value>The error content (Http response body).</value>
        public object ErrorContent { get; private set; }

        /// <summary>
        /// Gets or sets the HTTP headers
        /// </summary>
        /// <value>HTTP headers</value>
        public Multimap<string, string> Headers { get; private set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="ApiException"/> class.
        /// </summary>
        public ApiException() { }

        /// <summary>
        /// Initializes a new instance of the <see cref="ApiException"/> class.
        /// </summary>
        /// <param name="errorCode">HTTP status code.</param>
        /// <param name="message">Error message.</param>
        public ApiException(int errorCode, string message) : base(message)
        {
            this.ErrorCode = errorCode;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ApiException"/> class.
        /// </summary>
        /// <param name="errorCode">HTTP status code.</param>
        /// <param name="message">Error message.</param>
        /// <param name="errorContent">Error content.</param>
        /// <param name="headers">HTTP Headers.</param>
        public ApiException(int errorCode, string message, object errorContent = null, Multimap<string, string> headers = null) : base(message)
        {
            this.ErrorCode = errorCode;
            this.ErrorContent = errorContent;
            this.Headers = headers;
        }

        /// <summary>
        /// Gets a message that describes the current exception.
        /// </summary>
        public override string Message
        {
            get
            {
                return base.Message + $"\nResponse Headers:\n{FormatHeaders(Headers)}";
            }
        }

        private string FormatHeaders(Multimap<string, string> headers)
        {
            if (headers == null)
            {
                return "None";
            }
            var sb = new StringBuilder();
            foreach (var header in headers)
            {
                sb.AppendLine($"- {header.Key}: {string.Join(", ", header.Value)}");
            }
            return sb.ToString();
        }
    }

}
